diff options
| author | SeongJae Park <sj@kernel.org> | 2023-08-02 21:43:01 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-21 13:37:35 -0700 |
| commit | 2f1abcfccd86826777b2bcb2bb4e0d149a90ccf5 (patch) | |
| tree | 4c228804f361c7e54bb79a884c583cadde52cb26 /mm | |
| parent | ab9bda001b681c293fb72ef21f083adfbcd78028 (diff) | |
mm/damon/sysfs-schemes: support address range type DAMOS filter
Extend DAMON sysfs interface to support address range based DAMOS filters,
by adding a special keyword for the filter/<N>/type file, namely 'addr',
and two files under filter/<N>/ for specifying the start and the end
addresses of the range, namely 'addr_start' and 'addr_end'.
Link: https://lkml.kernel.org/r/20230802214312.110532-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/damon/sysfs-schemes.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 9a015079f3a4..03ddba3e216d 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -282,6 +282,7 @@ struct damon_sysfs_scheme_filter { enum damos_filter_type type; bool matching; char *memcg_path; + struct damon_addr_range addr_range; }; static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void) @@ -293,6 +294,7 @@ static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void) static const char * const damon_sysfs_scheme_filter_type_strs[] = { "anon", "memcg", + "addr", }; static ssize_t type_show(struct kobject *kobj, @@ -373,6 +375,44 @@ static ssize_t memcg_path_store(struct kobject *kobj, return count; } +static ssize_t addr_start_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + + return sysfs_emit(buf, "%lu\n", filter->addr_range.start); +} + +static ssize_t addr_start_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + int err = kstrtoul(buf, 0, &filter->addr_range.start); + + return err ? err : count; +} + +static ssize_t addr_end_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + + return sysfs_emit(buf, "%lu\n", filter->addr_range.end); +} + +static ssize_t addr_end_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + int err = kstrtoul(buf, 0, &filter->addr_range.end); + + return err ? err : count; +} + static void damon_sysfs_scheme_filter_release(struct kobject *kobj) { struct damon_sysfs_scheme_filter *filter = container_of(kobj, @@ -391,10 +431,18 @@ static struct kobj_attribute damon_sysfs_scheme_filter_matching_attr = static struct kobj_attribute damon_sysfs_scheme_filter_memcg_path_attr = __ATTR_RW_MODE(memcg_path, 0600); +static struct kobj_attribute damon_sysfs_scheme_filter_addr_start_attr = + __ATTR_RW_MODE(addr_start, 0600); + +static struct kobj_attribute damon_sysfs_scheme_filter_addr_end_attr = + __ATTR_RW_MODE(addr_end, 0600); + static struct attribute *damon_sysfs_scheme_filter_attrs[] = { &damon_sysfs_scheme_filter_type_attr.attr, &damon_sysfs_scheme_filter_matching_attr.attr, &damon_sysfs_scheme_filter_memcg_path_attr.attr, + &damon_sysfs_scheme_filter_addr_start_attr.attr, + &damon_sysfs_scheme_filter_addr_end_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter); @@ -1484,7 +1532,15 @@ static int damon_sysfs_set_scheme_filters(struct damos *scheme, damos_destroy_filter(filter); return err; } + } else if (filter->type == DAMOS_FILTER_TYPE_ADDR) { + if (sysfs_filter->addr_range.end < + sysfs_filter->addr_range.start) { + damos_destroy_filter(filter); + return -EINVAL; + } + filter->addr_range = sysfs_filter->addr_range; } + damos_add_filter(scheme, filter); } return 0; |